This text dispenses with database-centric metrics and instead shows how to use Oracle's response time statistics to diagnose performance problems in an Oracle application system. Former VP of Oracle's System Performance Group, Cary Millsap, clearly shows how eliminating requests for unneeded work improves performance dramatically. He also shows how the mathematical discipline of queueing theory can be combined with response time metrics to accurately predict the impact of system changes and upgrades. This text clearly and concisely explains how to use Oracle's response time statistics to diagnose and repair performance problems. It also shows how "queueing theory" can be applied to response time statistics to predict the impact of upgrades and other system changes. The book aims to eliminate the time-consuming, trial-and-error guesswork inherent in most conventional approaches to tuning. You can determine exactly where a system's performance problem is, and with equal importance,where it is not, in just a few minutes - even if the problem is several years old.
It also intends to cut a path through the complexity of current tuning methods, and streamline an approach that focuses on optimization techniques that any DBA can use quickly and successfully to make noticeable - even dramatic - improvements. For example, the one thing database users care most about is response time. Naturally, DBAs focus much of their time and effort towards improving response time. But it is entirely too easy to spend hundreds of hours to improve important system metrics such as hit ratios, average latencies, and wait times, only to find users are unable to perceive the difference. And an expensive hardware upgrade may not help either.
Über den Autor und weitere Mitwirkende
Cary Millsap is the former Vice President of Oracle's System Performance Group and the cofounder of Hotsos (http://www.hotsos.com), a company dedicated to Oracle system performance. Hotsos provides performance-improvement tools for Oracle environments and also delivers training in the form of clinics and symposiums. Cary is also a founding member of the Oak Table Network (http://www.oaktable.net), an informal association of "Oracle Scientists" well known throughout the Oracle community. Jeff Holt is one of the world's most productive Oracle performance optimization specialists. He has tremendous experience in constructing training programs and software tools to optimize the system performance management process. He is a former support analyst and consultant at Oracle Corporation, where he served as a technology leader in the System Performance Group. He is the Hotsos Tools lead designer and developer, the author of several technical papers, a Hotsos founding employee, and a Hotsos Clinic principal developer.